In this episode, Apollomon dies. And so does Damemon. And Mikey's innocence. And Ewan's sanity. It doesn't tie up loose ends so much as it hacks them off entirely.
In this episode, despite all the victories in the world, Mikey realizes it's impossible for everyone to leave Underworld alive. Turns out Underworld isn't all that picky about who it takes.
In this episode, Ewan and Mikey have a swordfight where they try to pierce the rose on the other's chest. ZETTAI! UNMEI! MOKUSHIROKU!